[
https://issues.apache.org/jira/browse/HIVE-7049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14129380#comment-14129380
]
sudhir mallem commented on HIVE-7049:
-------------------------------------
I'm seeing a similar issue but with "long" datatype.
Hive version: 0.13.1
Here is the error:
{code}
exception java.io.IOException:org.apache.avro.AvroRuntimeException: Not a
union: "long"
{code}
Here is the error from Log:
{code}
2014-09-10 23:45:05,679 ERROR CliDriver (SessionState.java:printError(545)) -
Failed with exception java.io.IOException:org.apache.avro.AvroRuntimeException:
Not a union: "long"
java.io.IOException: org.apache.avro.AvroRuntimeException: Not a union: "long"
at
org.apache.hadoop.hive.ql.exec.FetchOperator.getNextRow(FetchOperator.java:636)
at
org.apache.hadoop.hive.ql.exec.FetchOperator.pushRow(FetchOperator.java:534)
at org.apache.hadoop.hive.ql.exec.FetchTask.fetch(FetchTask.java:137)
at org.apache.hadoop.hive.ql.Driver.getResults(Driver.java:1519)
at
org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:285)
at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:220)
at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:423)
at
org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:792)
at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:686)
at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:625)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.hadoop.util.RunJar.main(RunJar.java:212)
Caused by: org.apache.avro.AvroRuntimeException: Not a union: "long"
at org.apache.avro.Schema.getTypes(Schema.java:266)
at
org.apache.hadoop.hive.serde2.avro.AvroDeserializer.deserializeNullableUnion(AvroDeserializer.java:269)
at
org.apache.hadoop.hive.serde2.avro.AvroDeserializer.worker(AvroDeserializer.java:200)
at
org.apache.hadoop.hive.serde2.avro.AvroDeserializer.workerBase(AvroDeserializer.java:188)
at
org.apache.hadoop.hive.serde2.avro.AvroDeserializer.deserialize(AvroDeserializer.java:174)
at
org.apache.hadoop.hive.serde2.avro.AvroSerDe.deserialize(AvroSerDe.java:99)
at
org.apache.hadoop.hive.ql.exec.FetchOperator.getNextRow(FetchOperator.java:620)
{code}
> Unable to deserialize AVRO data when file schema and record schema are
> different and nullable
> ---------------------------------------------------------------------------------------------
>
> Key: HIVE-7049
> URL: https://issues.apache.org/jira/browse/HIVE-7049
> Project: Hive
> Issue Type: Bug
> Reporter: Mohammad Kamrul Islam
> Assignee: Mohammad Kamrul Islam
> Attachments: HIVE-7049.1.patch
>
>
> It mainly happens when
> 1 )file schema and record schema are not same
> 2 ) Record schema is nullable but file schema is not.
> The potential code location is at class AvroDeserialize
>
> {noformat}
> if(AvroSerdeUtils.isNullableType(recordSchema)) {
> return deserializeNullableUnion(datum, fileSchema, recordSchema,
> columnType);
> }
> {noformat}
> In the above code snippet, recordSchema is verified if it is nullable. But
> the file schema is not checked.
> I tested with these values:
> {noformat}
> recordSchema= ["null","string"]
> fielSchema= "string"
> {noformat}
> And i got the following exception <line numbers might not be the same due to
> mu debugged code version>.
> {noformat}
> org.apache.avro.AvroRuntimeException: Not a union: "string"
> at org.apache.avro.Schema.getTypes(Schema.java:272)
> at
> org.apache.hadoop.hive.serde2.avro.AvroDeserializer.deserializeNullableUnion(AvroDeserializer.java:275)
> at
> org.apache.hadoop.hive.serde2.avro.AvroDeserializer.worker(AvroDeserializer.java:205)
> at
> org.apache.hadoop.hive.serde2.avro.AvroDeserializer.workerBase(AvroDeserializer.java:188)
> at
> org.apache.hadoop.hive.serde2.avro.AvroDeserializer.deserialize(AvroDeserializer.java:174)
> at
> org.apache.hadoop.hive.serde2.avro.TestAvroDeserializer.verifyNullableType(TestAvroDeserializer.java:487)
> at
> org.apache.hadoop.hive.serde2.avro.TestAvroDeserializer.canDeserializeNullableTypes(TestAvroDeserializer.java:407)
> {noformat}
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